“The IRS says” can refer to very different sources. The Internal Revenue Code is enacted by Congress. Treasury regulations are promulgated under statutory authority. Courts interpret the law. The IRS also publishes rulings, revenue procedures, notices, announcements, forms, instructions, publications, webpages, FAQs, and the Internal Revenue Manual.
Identify the source before using it
A taxpayer-facing webpage may provide a useful description of current agency practice, but it is not automatically a substitute for the controlling Code section or regulation. Published guidance can carry greater formal significance than an FAQ. The Internal Revenue Manual directs agency personnel but generally is not itself the source of a taxpayer’s substantive legal rights.
Research from the top down
- Identify the governing Internal Revenue Code provision.
- Locate applicable Treasury regulations and effective dates.
- Review controlling judicial decisions.
- Examine published administrative guidance.
- Use forms, instructions, publications, webpages, and the Manual to understand implementation.
Procedure can still make agency materials critical
A notice, form instruction, or Manual provision can be practically important even when it is not controlling law. It may reveal a filing address, deadline, internal process, required submission, or the standard an employee will apply. The research question is not whether the material matters; it is why it matters and how it fits with superior authority.